A person's blood pressure in mmHg, y, over a time period represented in seconds, t, is shown. Which function models the situation represented in the graph?

Whats the name of the vertical axis

Apool measures 100 meters by 100 meters a toddler inside the pool and trows a ball 60 centimeters from one edge of the pool.how far is the ball from the opposite edge of the pool

How many zeros does this polynomial function, y=(x-8)(x+3)^2